Compared with special relativity, general relativity is more ...

[Metfan725]

Compared with special relativity, general relativity is more concerned with
 
  A) acceleration.
  B) gravitation.
  C) spacetime geometry.
  D) all of the above
  E) none of the above

Question 2

A steel bar with a cross-sectional area of 1.00  10-4 m2 is heated to 100C and then it is clamped at both ends with clamps that are 2.0 m apart.
 
  When the bar cools to 20C what is the force exerted by the bar on the clamps? The coefficient of thermal expansion of steel is 12  10-6 K-1 and Young's modulus for steel is 20  1010 N/m2. A) 1.9  104 N
  B) 3.8  104 N
  C) 1.9  103 N
  D) 3.8  103 N
  E) 1.9  105 N

[yasmin]

Answer to Question 1

Answer: D

Answer to Question 2

A

[Metfan725]

Excellent

[brbarasa]

Gracias!